4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
23 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
31 #include <uuid/uuid.h>
34 #include <sys/types.h>
38 #include <sys/param.h>
39 #include <sys/dktp/fdisk.h>
40 #include <sys/efi_partition.h>
41 #include <sys/byteorder.h>
42 #if defined(__linux__)
46 static struct uuid_to_ptag
{
48 } conversion_array
[] = {
55 { EFI_UNUSED
}, /* STAND is never used */
59 { EFI_UNUSED
}, /* CACHE (cachefs) is never used */
76 * Default vtoc information for non-SVr4 partitions
78 struct dk_map2 default_vtoc_map
[NDKMAP
] = {
79 { V_ROOT
, 0 }, /* a - 0 */
80 { V_SWAP
, V_UNMNT
}, /* b - 1 */
81 { V_BACKUP
, V_UNMNT
}, /* c - 2 */
82 { V_UNASSIGNED
, 0 }, /* d - 3 */
83 { V_UNASSIGNED
, 0 }, /* e - 4 */
84 { V_UNASSIGNED
, 0 }, /* f - 5 */
85 { V_USR
, 0 }, /* g - 6 */
86 { V_UNASSIGNED
, 0 }, /* h - 7 */
88 #if defined(_SUNOS_VTOC_16)
90 #if defined(i386) || defined(__amd64) || defined(__arm)
91 { V_BOOT
, V_UNMNT
}, /* i - 8 */
92 { V_ALTSCTR
, 0 }, /* j - 9 */
95 #error No VTOC format defined.
96 #endif /* defined(i386) */
98 { V_UNASSIGNED
, 0 }, /* k - 10 */
99 { V_UNASSIGNED
, 0 }, /* l - 11 */
100 { V_UNASSIGNED
, 0 }, /* m - 12 */
101 { V_UNASSIGNED
, 0 }, /* n - 13 */
102 { V_UNASSIGNED
, 0 }, /* o - 14 */
103 { V_UNASSIGNED
, 0 }, /* p - 15 */
104 #endif /* defined(_SUNOS_VTOC_16) */
113 static int efi_read(int, struct dk_gpt
*);
116 * Return a 32-bit CRC of the contents of the buffer. Pre-and-post
117 * one's conditioning will be handled by crc32() internally.
120 efi_crc32(const unsigned char *buf
, unsigned int size
)
122 uint32_t crc
= crc32(0, Z_NULL
, 0);
124 crc
= crc32(crc
, buf
, size
);
130 read_disk_info(int fd
, diskaddr_t
*capacity
, uint_t
*lbsize
)
133 unsigned long long capacity_size
;
135 if (ioctl(fd
, BLKSSZGET
, §or_size
) < 0)
138 if (ioctl(fd
, BLKGETSIZE64
, &capacity_size
) < 0)
141 *lbsize
= (uint_t
)sector_size
;
142 *capacity
= (diskaddr_t
)(capacity_size
/ sector_size
);
148 efi_get_info(int fd
, struct dk_cinfo
*dki_info
)
150 #if defined(__linux__)
155 memset(dki_info
, 0, sizeof(*dki_info
));
157 path
= calloc(PATH_MAX
, 1);
162 * The simplest way to get the partition number under linux is
163 * to parse it out of the /dev/<disk><parition> block device name.
164 * The kernel creates this using the partition number when it
165 * populates /dev/ so it may be trusted. The tricky bit here is
166 * that the naming convention is based on the block device type.
167 * So we need to take this in to account when parsing out the
168 * partition information. Another issue is that the libefi API
169 * API only provides the open fd and not the file path. To handle
170 * this realpath(3) is used to resolve the block device name from
171 * /proc/self/fd/<fd>. Aside from the partition number we collect
172 * some additional device info.
174 (void) sprintf(path
, "/proc/self/fd/%d", fd
);
175 dev_path
= realpath(path
, NULL
);
178 if (dev_path
== NULL
)
181 if ((strncmp(dev_path
, "/dev/sd", 7) == 0)) {
182 strcpy(dki_info
->dki_cname
, "sd");
183 dki_info
->dki_ctype
= DKC_SCSI_CCS
;
184 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z]%hu",
186 &dki_info
->dki_partition
);
187 } else if ((strncmp(dev_path
, "/dev/hd", 7) == 0)) {
188 strcpy(dki_info
->dki_cname
, "hd");
189 dki_info
->dki_ctype
= DKC_DIRECT
;
190 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z]%hu",
192 &dki_info
->dki_partition
);
193 } else if ((strncmp(dev_path
, "/dev/md", 7) == 0)) {
194 strcpy(dki_info
->dki_cname
, "pseudo");
195 dki_info
->dki_ctype
= DKC_MD
;
196 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z0-9]p%hu",
198 &dki_info
->dki_partition
);
199 } else if ((strncmp(dev_path
, "/dev/vd", 7) == 0)) {
200 strcpy(dki_info
->dki_cname
, "vd");
201 dki_info
->dki_ctype
= DKC_MD
;
202 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z]%hu",
204 &dki_info
->dki_partition
);
205 } else if ((strncmp(dev_path
, "/dev/dm-", 8) == 0)) {
206 strcpy(dki_info
->dki_cname
, "pseudo");
207 dki_info
->dki_ctype
= DKC_VBD
;
208 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z0-9-]p%hu",
210 &dki_info
->dki_partition
);
211 } else if ((strncmp(dev_path
, "/dev/ram", 8) == 0)) {
212 strcpy(dki_info
->dki_cname
, "pseudo");
213 dki_info
->dki_ctype
= DKC_PCMCIA_MEM
;
214 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z0-9]p%hu",
216 &dki_info
->dki_partition
);
217 } else if ((strncmp(dev_path
, "/dev/loop", 9) == 0)) {
218 strcpy(dki_info
->dki_cname
, "pseudo");
219 dki_info
->dki_ctype
= DKC_VBD
;
220 rval
= sscanf(dev_path
, "/dev/%[a-zA-Z0-9]p%hu",
222 &dki_info
->dki_partition
);
224 strcpy(dki_info
->dki_dname
, "unknown");
225 strcpy(dki_info
->dki_cname
, "unknown");
226 dki_info
->dki_ctype
= DKC_UNKNOWN
;
234 dki_info
->dki_partition
= 0;
239 if (ioctl(fd
, DKIOCINFO
, (caddr_t
)dki_info
) == -1)
245 (void) fprintf(stderr
, "DKIOCINFO errno 0x%x\n", errno
);
258 * the number of blocks the EFI label takes up (round up to nearest
261 #define NBLOCKS(p, l) (1 + ((((p) * (int)sizeof (efi_gpe_t)) + \
263 /* number of partitions -- limited by what we can malloc */
264 #define MAX_PARTS ((4294967295UL - sizeof (struct dk_gpt)) / \
265 sizeof (struct dk_part))
268 efi_alloc_and_init(int fd
, uint32_t nparts
, struct dk_gpt
**vtoc
)
270 diskaddr_t capacity
= 0;
276 struct dk_cinfo dki_info
;
278 if (read_disk_info(fd
, &capacity
, &lbsize
) != 0)
281 #if defined(__linux__)
282 if (efi_get_info(fd
, &dki_info
) != 0)
285 if (dki_info
.dki_partition
!= 0)
288 if ((dki_info
.dki_ctype
== DKC_PCMCIA_MEM
) ||
289 (dki_info
.dki_ctype
== DKC_VBD
) ||
290 (dki_info
.dki_ctype
== DKC_UNKNOWN
))
294 nblocks
= NBLOCKS(nparts
, lbsize
);
295 if ((nblocks
* lbsize
) < EFI_MIN_ARRAY_SIZE
+ lbsize
) {
296 /* 16K plus one block for the GPT */
297 nblocks
= EFI_MIN_ARRAY_SIZE
/ lbsize
+ 1;
300 if (nparts
> MAX_PARTS
) {
302 (void) fprintf(stderr
,
303 "the maximum number of partitions supported is %lu\n",
309 length
= sizeof (struct dk_gpt
) +
310 sizeof (struct dk_part
) * (nparts
- 1);
312 if ((*vtoc
= calloc(length
, 1)) == NULL
)
317 vptr
->efi_version
= EFI_VERSION_CURRENT
;
318 vptr
->efi_lbasize
= lbsize
;
319 vptr
->efi_nparts
= nparts
;
321 * add one block here for the PMBR; on disks with a 512 byte
322 * block size and 128 or fewer partitions, efi_first_u_lba
323 * should work out to "34"
325 vptr
->efi_first_u_lba
= nblocks
+ 1;
326 vptr
->efi_last_lba
= capacity
- 1;
327 vptr
->efi_altern_lba
= capacity
-1;
328 vptr
->efi_last_u_lba
= vptr
->efi_last_lba
- nblocks
;
330 (void) uuid_generate((uchar_t
*)&uuid
);
331 UUID_LE_CONVERT(vptr
->efi_disk_uguid
, uuid
);
336 * Read EFI - return partition number upon success.
339 efi_alloc_and_read(int fd
, struct dk_gpt
**vtoc
)
345 /* figure out the number of entries that would fit into 16K */
346 nparts
= EFI_MIN_ARRAY_SIZE
/ sizeof (efi_gpe_t
);
347 length
= (int) sizeof (struct dk_gpt
) +
348 (int) sizeof (struct dk_part
) * (nparts
- 1);
349 if ((*vtoc
= calloc(length
, 1)) == NULL
)
352 (*vtoc
)->efi_nparts
= nparts
;
353 rval
= efi_read(fd
, *vtoc
);
355 if ((rval
== VT_EINVAL
) && (*vtoc
)->efi_nparts
> nparts
) {
357 length
= (int) sizeof (struct dk_gpt
) +
358 (int) sizeof (struct dk_part
) *
359 ((*vtoc
)->efi_nparts
- 1);
360 nparts
= (*vtoc
)->efi_nparts
;
361 if ((tmp
= realloc(*vtoc
, length
)) == NULL
) {
367 rval
= efi_read(fd
, *vtoc
);
373 (void) fprintf(stderr
,
374 "read of EFI table failed, rval=%d\n", rval
);
384 efi_ioctl(int fd
, int cmd
, dk_efi_t
*dk_ioc
)
386 void *data
= dk_ioc
->dki_data
;
388 #if defined(__linux__)
393 * When the IO is not being performed in kernel as an ioctl we need
394 * to know the sector size so we can seek to the proper byte offset.
396 if (read_disk_info(fd
, &capacity
, &lbsize
) == -1) {
398 fprintf(stderr
,"unable to read disk info: %d",errno
);
408 (void) fprintf(stderr
, "DKIOCGETEFI assuming "
409 "LBA %d bytes\n", DEV_BSIZE
);
414 error
= lseek(fd
, dk_ioc
->dki_lba
* lbsize
, SEEK_SET
);
417 (void) fprintf(stderr
, "DKIOCGETEFI lseek "
418 "error: %d\n", errno
);
422 error
= read(fd
, data
, dk_ioc
->dki_length
);
425 (void) fprintf(stderr
, "DKIOCGETEFI read "
426 "error: %d\n", errno
);
430 if (error
!= dk_ioc
->dki_length
) {
432 (void) fprintf(stderr
, "DKIOCGETEFI short "
433 "read of %d bytes\n", error
);
443 (void) fprintf(stderr
, "DKIOCSETEFI unknown "
449 error
= lseek(fd
, dk_ioc
->dki_lba
* lbsize
, SEEK_SET
);
452 (void) fprintf(stderr
, "DKIOCSETEFI lseek "
453 "error: %d\n", errno
);
457 error
= write(fd
, data
, dk_ioc
->dki_length
);
460 (void) fprintf(stderr
, "DKIOCSETEFI write "
461 "error: %d\n", errno
);
465 if (error
!= dk_ioc
->dki_length
) {
467 (void) fprintf(stderr
, "DKIOCSETEFI short "
468 "write of %d bytes\n", error
);
473 /* Sync the new EFI table to disk */
478 /* Ensure any local disk cache is also flushed */
479 if (ioctl(fd
, BLKFLSBUF
, 0) == -1)
487 (void) fprintf(stderr
, "unsupported ioctl()\n");
493 dk_ioc
->dki_data_64
= (uint64_t)(uintptr_t)data
;
494 error
= ioctl(fd
, cmd
, (void *)dk_ioc
);
495 dk_ioc
->dki_data
= data
;
500 #if defined(__linux__)
507 /* Notify the kernel a devices partition table has been updated */
508 while ((error
= ioctl(fd
, BLKRRPART
)) != 0) {
510 (void) fprintf(stderr
, "the kernel failed to rescan "
511 "the partition table: %d\n", errno
);
521 check_label(int fd
, dk_efi_t
*dk_ioc
)
526 if (efi_ioctl(fd
, DKIOCGETEFI
, dk_ioc
) == -1) {
534 efi
= dk_ioc
->dki_data
;
535 if (efi
->efi_gpt_Signature
!= LE_64(EFI_SIGNATURE
)) {
537 (void) fprintf(stderr
,
538 "Bad EFI signature: 0x%llx != 0x%llx\n",
539 (long long)efi
->efi_gpt_Signature
,
540 (long long)LE_64(EFI_SIGNATURE
));
545 * check CRC of the header; the size of the header should
546 * never be larger than one block
548 crc
= efi
->efi_gpt_HeaderCRC32
;
549 efi
->efi_gpt_HeaderCRC32
= 0;
550 len_t headerSize
= (len_t
)LE_32(efi
->efi_gpt_HeaderSize
);
552 if(headerSize
< EFI_MIN_LABEL_SIZE
|| headerSize
> EFI_LABEL_SIZE
) {
554 (void) fprintf(stderr
,
555 "Invalid EFI HeaderSize %llu. Assuming %d.\n",
556 headerSize
, EFI_MIN_LABEL_SIZE
);
559 if ((headerSize
> dk_ioc
->dki_length
) ||
560 crc
!= LE_32(efi_crc32((unsigned char *)efi
, headerSize
))) {
562 (void) fprintf(stderr
,
563 "Bad EFI CRC: 0x%x != 0x%x\n",
564 crc
, LE_32(efi_crc32((unsigned char *)efi
,
573 efi_read(int fd
, struct dk_gpt
*vtoc
)
580 diskaddr_t capacity
= 0;
582 struct dk_minfo disk_info
;
585 efi_gpe_t
*efi_parts
;
586 struct dk_cinfo dki_info
;
587 uint32_t user_length
;
588 boolean_t legacy_label
= B_FALSE
;
591 * get the partition number for this file descriptor.
593 if ((rval
= efi_get_info(fd
, &dki_info
)) != 0)
596 if ((strncmp(dki_info
.dki_cname
, "pseudo", 7) == 0) &&
597 (strncmp(dki_info
.dki_dname
, "md", 3) == 0)) {
599 } else if ((strncmp(dki_info
.dki_cname
, "vdc", 4) == 0) &&
600 (strncmp(dki_info
.dki_dname
, "vdc", 4) == 0)) {
602 * The controller and drive name "vdc" (virtual disk client)
603 * indicates a LDoms virtual disk.
608 /* get the LBA size */
609 if (read_disk_info(fd
, &capacity
, &lbsize
) == -1) {
611 (void) fprintf(stderr
,
612 "unable to read disk info: %d",
618 disk_info
.dki_lbsize
= lbsize
;
619 disk_info
.dki_capacity
= capacity
;
621 if (disk_info
.dki_lbsize
== 0) {
623 (void) fprintf(stderr
,
624 "efi_read: assuming LBA 512 bytes\n");
626 disk_info
.dki_lbsize
= DEV_BSIZE
;
629 * Read the EFI GPT to figure out how many partitions we need
633 if (NBLOCKS(vtoc
->efi_nparts
, disk_info
.dki_lbsize
) < 34) {
634 label_len
= EFI_MIN_ARRAY_SIZE
+ disk_info
.dki_lbsize
;
636 label_len
= vtoc
->efi_nparts
* (int) sizeof (efi_gpe_t
) +
637 disk_info
.dki_lbsize
;
638 if (label_len
% disk_info
.dki_lbsize
) {
639 /* pad to physical sector size */
640 label_len
+= disk_info
.dki_lbsize
;
641 label_len
&= ~(disk_info
.dki_lbsize
- 1);
645 if (posix_memalign((void **)&dk_ioc
.dki_data
,
646 disk_info
.dki_lbsize
, label_len
))
649 memset(dk_ioc
.dki_data
, 0, label_len
);
650 dk_ioc
.dki_length
= disk_info
.dki_lbsize
;
651 user_length
= vtoc
->efi_nparts
;
652 efi
= dk_ioc
.dki_data
;
654 dk_ioc
.dki_length
= label_len
;
655 if (efi_ioctl(fd
, DKIOCGETEFI
, &dk_ioc
) == -1) {
663 } else if ((rval
= check_label(fd
, &dk_ioc
)) == VT_EINVAL
) {
665 * No valid label here; try the alternate. Note that here
666 * we just read GPT header and save it into dk_ioc.data,
667 * Later, we will read GUID partition entry array if we
668 * can get valid GPT header.
672 * This is a workaround for legacy systems. In the past, the
673 * last sector of SCSI disk was invisible on x86 platform. At
674 * that time, backup label was saved on the next to the last
675 * sector. It is possible for users to move a disk from previous
676 * solaris system to present system. Here, we attempt to search
677 * legacy backup EFI label first.
679 dk_ioc
.dki_lba
= disk_info
.dki_capacity
- 2;
680 dk_ioc
.dki_length
= disk_info
.dki_lbsize
;
681 rval
= check_label(fd
, &dk_ioc
);
682 if (rval
== VT_EINVAL
) {
684 * we didn't find legacy backup EFI label, try to
685 * search backup EFI label in the last block.
687 dk_ioc
.dki_lba
= disk_info
.dki_capacity
- 1;
688 dk_ioc
.dki_length
= disk_info
.dki_lbsize
;
689 rval
= check_label(fd
, &dk_ioc
);
691 legacy_label
= B_TRUE
;
693 (void) fprintf(stderr
,
694 "efi_read: primary label corrupt; "
695 "using EFI backup label located on"
696 " the last block\n");
699 if ((efi_debug
) && (rval
== 0))
700 (void) fprintf(stderr
, "efi_read: primary label"
701 " corrupt; using legacy EFI backup label "
702 " located on the next to last block\n");
706 dk_ioc
.dki_lba
= LE_64(efi
->efi_gpt_PartitionEntryLBA
);
707 vtoc
->efi_flags
|= EFI_GPT_PRIMARY_CORRUPT
;
709 LE_32(efi
->efi_gpt_NumberOfPartitionEntries
);
711 * Partition tables are between backup GPT header
712 * table and ParitionEntryLBA (the starting LBA of
713 * the GUID partition entries array). Now that we
714 * already got valid GPT header and saved it in
715 * dk_ioc.dki_data, we try to get GUID partition
719 dk_ioc
.dki_data
= (efi_gpt_t
*)((char *)dk_ioc
.dki_data
720 + disk_info
.dki_lbsize
);
722 dk_ioc
.dki_length
= disk_info
.dki_capacity
- 1 -
725 dk_ioc
.dki_length
= disk_info
.dki_capacity
- 2 -
727 dk_ioc
.dki_length
*= disk_info
.dki_lbsize
;
728 if (dk_ioc
.dki_length
>
729 ((len_t
)label_len
- sizeof (*dk_ioc
.dki_data
))) {
733 * read GUID partition entry array
735 rval
= efi_ioctl(fd
, DKIOCGETEFI
, &dk_ioc
);
739 } else if (rval
== 0) {
741 dk_ioc
.dki_lba
= LE_64(efi
->efi_gpt_PartitionEntryLBA
);
743 dk_ioc
.dki_data
= (efi_gpt_t
*)((char *)dk_ioc
.dki_data
744 + disk_info
.dki_lbsize
);
745 dk_ioc
.dki_length
= label_len
- disk_info
.dki_lbsize
;
746 rval
= efi_ioctl(fd
, DKIOCGETEFI
, &dk_ioc
);
748 } else if (vdc_flag
&& rval
== VT_ERROR
&& errno
== EINVAL
) {
750 * When the device is a LDoms virtual disk, the DKIOCGETEFI
751 * ioctl can fail with EINVAL if the virtual disk backend
752 * is a ZFS volume serviced by a domain running an old version
753 * of Solaris. This is because the DKIOCGETEFI ioctl was
754 * initially incorrectly implemented for a ZFS volume and it
755 * expected the GPT and GPE to be retrieved with a single ioctl.
756 * So we try to read the GPT and the GPE using that old style
760 dk_ioc
.dki_length
= label_len
;
761 rval
= check_label(fd
, &dk_ioc
);
769 /* LINTED -- always longlong aligned */
770 efi_parts
= (efi_gpe_t
*)(((char *)efi
) + disk_info
.dki_lbsize
);
773 * Assemble this into a "dk_gpt" struct for easier
774 * digestibility by applications.
776 vtoc
->efi_version
= LE_32(efi
->efi_gpt_Revision
);
777 vtoc
->efi_nparts
= LE_32(efi
->efi_gpt_NumberOfPartitionEntries
);
778 vtoc
->efi_part_size
= LE_32(efi
->efi_gpt_SizeOfPartitionEntry
);
779 vtoc
->efi_lbasize
= disk_info
.dki_lbsize
;
780 vtoc
->efi_last_lba
= disk_info
.dki_capacity
- 1;
781 vtoc
->efi_first_u_lba
= LE_64(efi
->efi_gpt_FirstUsableLBA
);
782 vtoc
->efi_last_u_lba
= LE_64(efi
->efi_gpt_LastUsableLBA
);
783 vtoc
->efi_altern_lba
= LE_64(efi
->efi_gpt_AlternateLBA
);
784 UUID_LE_CONVERT(vtoc
->efi_disk_uguid
, efi
->efi_gpt_DiskGUID
);
787 * If the array the user passed in is too small, set the length
788 * to what it needs to be and return
790 if (user_length
< vtoc
->efi_nparts
) {
794 for (i
= 0; i
< vtoc
->efi_nparts
; i
++) {
796 UUID_LE_CONVERT(vtoc
->efi_parts
[i
].p_guid
,
797 efi_parts
[i
].efi_gpe_PartitionTypeGUID
);
800 j
< sizeof (conversion_array
)
801 / sizeof (struct uuid_to_ptag
); j
++) {
803 if (bcmp(&vtoc
->efi_parts
[i
].p_guid
,
804 &conversion_array
[j
].uuid
,
805 sizeof (struct uuid
)) == 0) {
806 vtoc
->efi_parts
[i
].p_tag
= j
;
810 if (vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
)
812 vtoc
->efi_parts
[i
].p_flag
=
813 LE_16(efi_parts
[i
].efi_gpe_Attributes
.PartitionAttrs
);
814 vtoc
->efi_parts
[i
].p_start
=
815 LE_64(efi_parts
[i
].efi_gpe_StartingLBA
);
816 vtoc
->efi_parts
[i
].p_size
=
817 LE_64(efi_parts
[i
].efi_gpe_EndingLBA
) -
818 vtoc
->efi_parts
[i
].p_start
+ 1;
819 for (j
= 0; j
< EFI_PART_NAME_LEN
; j
++) {
820 vtoc
->efi_parts
[i
].p_name
[j
] =
822 efi_parts
[i
].efi_gpe_PartitionName
[j
]);
825 UUID_LE_CONVERT(vtoc
->efi_parts
[i
].p_uguid
,
826 efi_parts
[i
].efi_gpe_UniquePartitionGUID
);
830 return (dki_info
.dki_partition
);
833 /* writes a "protective" MBR */
835 write_pmbr(int fd
, struct dk_gpt
*vtoc
)
840 diskaddr_t size_in_lba
;
844 len
= (vtoc
->efi_lbasize
== 0) ? sizeof (mb
) : vtoc
->efi_lbasize
;
845 if (posix_memalign((void **)&buf
, len
, len
))
849 * Preserve any boot code and disk signature if the first block is
854 dk_ioc
.dki_length
= len
;
855 /* LINTED -- always longlong aligned */
856 dk_ioc
.dki_data
= (efi_gpt_t
*)buf
;
857 if (efi_ioctl(fd
, DKIOCGETEFI
, &dk_ioc
) == -1) {
858 (void *) memcpy(&mb
, buf
, sizeof (mb
));
859 bzero(&mb
, sizeof (mb
));
860 mb
.signature
= LE_16(MBB_MAGIC
);
862 (void *) memcpy(&mb
, buf
, sizeof (mb
));
863 if (mb
.signature
!= LE_16(MBB_MAGIC
)) {
864 bzero(&mb
, sizeof (mb
));
865 mb
.signature
= LE_16(MBB_MAGIC
);
869 bzero(&mb
.parts
, sizeof (mb
.parts
));
870 cp
= (uchar_t
*)&mb
.parts
[0];
871 /* bootable or not */
873 /* beginning CHS; 0xffffff if not representable */
879 /* ending CHS; 0xffffff if not representable */
883 /* starting LBA: 1 (little endian format) by EFI definition */
888 /* ending LBA: last block on the disk (little endian format) */
889 size_in_lba
= vtoc
->efi_last_lba
;
890 if (size_in_lba
< 0xffffffff) {
891 *cp
++ = (size_in_lba
& 0x000000ff);
892 *cp
++ = (size_in_lba
& 0x0000ff00) >> 8;
893 *cp
++ = (size_in_lba
& 0x00ff0000) >> 16;
894 *cp
++ = (size_in_lba
& 0xff000000) >> 24;
902 (void *) memcpy(buf
, &mb
, sizeof (mb
));
903 /* LINTED -- always longlong aligned */
904 dk_ioc
.dki_data
= (efi_gpt_t
*)buf
;
906 dk_ioc
.dki_length
= len
;
907 if (efi_ioctl(fd
, DKIOCSETEFI
, &dk_ioc
) == -1) {
922 /* make sure the user specified something reasonable */
924 check_input(struct dk_gpt
*vtoc
)
928 diskaddr_t istart
, jstart
, isize
, jsize
, endsect
;
931 * Sanity-check the input (make sure no partitions overlap)
933 for (i
= 0; i
< vtoc
->efi_nparts
; i
++) {
934 /* It can't be unassigned and have an actual size */
935 if ((vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
) &&
936 (vtoc
->efi_parts
[i
].p_size
!= 0)) {
938 (void) fprintf(stderr
, "partition %d is "
939 "\"unassigned\" but has a size of %llu",
940 i
, vtoc
->efi_parts
[i
].p_size
);
944 if (vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
) {
945 if (uuid_is_null((uchar_t
*)&vtoc
->efi_parts
[i
].p_guid
))
947 /* we have encountered an unknown uuid */
948 vtoc
->efi_parts
[i
].p_tag
= 0xff;
950 if (vtoc
->efi_parts
[i
].p_tag
== V_RESERVED
) {
951 if (resv_part
!= -1) {
953 (void) fprintf(stderr
, "found "
954 "duplicate reserved partition "
961 if ((vtoc
->efi_parts
[i
].p_start
< vtoc
->efi_first_u_lba
) ||
962 (vtoc
->efi_parts
[i
].p_start
> vtoc
->efi_last_u_lba
)) {
964 (void) fprintf(stderr
,
965 "Partition %d starts at %llu. ",
967 vtoc
->efi_parts
[i
].p_start
);
968 (void) fprintf(stderr
,
969 "It must be between %llu and %llu.\n",
970 vtoc
->efi_first_u_lba
,
971 vtoc
->efi_last_u_lba
);
975 if ((vtoc
->efi_parts
[i
].p_start
+
976 vtoc
->efi_parts
[i
].p_size
<
977 vtoc
->efi_first_u_lba
) ||
978 (vtoc
->efi_parts
[i
].p_start
+
979 vtoc
->efi_parts
[i
].p_size
>
980 vtoc
->efi_last_u_lba
+ 1)) {
982 (void) fprintf(stderr
,
983 "Partition %d ends at %llu. ",
985 vtoc
->efi_parts
[i
].p_start
+
986 vtoc
->efi_parts
[i
].p_size
);
987 (void) fprintf(stderr
,
988 "It must be between %llu and %llu.\n",
989 vtoc
->efi_first_u_lba
,
990 vtoc
->efi_last_u_lba
);
995 for (j
= 0; j
< vtoc
->efi_nparts
; j
++) {
996 isize
= vtoc
->efi_parts
[i
].p_size
;
997 jsize
= vtoc
->efi_parts
[j
].p_size
;
998 istart
= vtoc
->efi_parts
[i
].p_start
;
999 jstart
= vtoc
->efi_parts
[j
].p_start
;
1000 if ((i
!= j
) && (isize
!= 0) && (jsize
!= 0)) {
1001 endsect
= jstart
+ jsize
-1;
1002 if ((jstart
<= istart
) &&
1003 (istart
<= endsect
)) {
1005 (void) fprintf(stderr
,
1006 "Partition %d overlaps "
1007 "partition %d.", i
, j
);
1014 /* just a warning for now */
1015 if ((resv_part
== -1) && efi_debug
) {
1016 (void) fprintf(stderr
,
1017 "no reserved partition found\n");
1023 * add all the unallocated space to the current label
1026 efi_use_whole_disk(int fd
)
1028 struct dk_gpt
*efi_label
;
1031 uint_t phy_last_slice
= 0;
1032 diskaddr_t pl_start
= 0;
1035 rval
= efi_alloc_and_read(fd
, &efi_label
);
1040 /* find the last physically non-zero partition */
1041 for (i
= 0; i
< efi_label
->efi_nparts
- 2; i
++) {
1042 if (pl_start
< efi_label
->efi_parts
[i
].p_start
) {
1043 pl_start
= efi_label
->efi_parts
[i
].p_start
;
1047 pl_size
= efi_label
->efi_parts
[phy_last_slice
].p_size
;
1050 * If alter_lba is 1, we are using the backup label.
1051 * Since we can locate the backup label by disk capacity,
1052 * there must be no unallocated space.
1054 if ((efi_label
->efi_altern_lba
== 1) || (efi_label
->efi_altern_lba
1055 >= efi_label
->efi_last_lba
)) {
1057 (void) fprintf(stderr
,
1058 "efi_use_whole_disk: requested space not found\n");
1060 efi_free(efi_label
);
1065 * If there is space between the last physically non-zero partition
1066 * and the reserved partition, just add the unallocated space to this
1067 * area. Otherwise, the unallocated space is added to the last
1068 * physically non-zero partition.
1070 if (pl_start
+ pl_size
- 1 == efi_label
->efi_last_u_lba
-
1071 EFI_MIN_RESV_SIZE
) {
1072 efi_label
->efi_parts
[phy_last_slice
].p_size
+=
1073 efi_label
->efi_last_lba
- efi_label
->efi_altern_lba
;
1077 * Move the reserved partition. There is currently no data in
1078 * here except fabricated devids (which get generated via
1079 * efi_write()). So there is no need to copy data.
1081 efi_label
->efi_parts
[efi_label
->efi_nparts
- 1].p_start
+=
1082 efi_label
->efi_last_lba
- efi_label
->efi_altern_lba
;
1083 efi_label
->efi_last_u_lba
+= efi_label
->efi_last_lba
1084 - efi_label
->efi_altern_lba
;
1086 rval
= efi_write(fd
, efi_label
);
1089 (void) fprintf(stderr
,
1090 "efi_use_whole_disk:fail to write label, rval=%d\n",
1093 efi_free(efi_label
);
1097 efi_free(efi_label
);
1103 * write EFI label and backup label
1106 efi_write(int fd
, struct dk_gpt
*vtoc
)
1110 efi_gpe_t
*efi_parts
;
1112 struct dk_cinfo dki_info
;
1116 diskaddr_t lba_backup_gpt_hdr
;
1118 if ((rval
= efi_get_info(fd
, &dki_info
)) != 0)
1121 /* check if we are dealing wih a metadevice */
1122 if ((strncmp(dki_info
.dki_cname
, "pseudo", 7) == 0) &&
1123 (strncmp(dki_info
.dki_dname
, "md", 3) == 0)) {
1127 if (check_input(vtoc
)) {
1129 * not valid; if it's a metadevice just pass it down
1130 * because SVM will do its own checking
1138 if (NBLOCKS(vtoc
->efi_nparts
, vtoc
->efi_lbasize
) < 34) {
1139 dk_ioc
.dki_length
= EFI_MIN_ARRAY_SIZE
+ vtoc
->efi_lbasize
;
1141 dk_ioc
.dki_length
= NBLOCKS(vtoc
->efi_nparts
,
1142 vtoc
->efi_lbasize
) *
1147 * the number of blocks occupied by GUID partition entry array
1149 nblocks
= dk_ioc
.dki_length
/ vtoc
->efi_lbasize
- 1;
1152 * Backup GPT header is located on the block after GUID
1153 * partition entry array. Here, we calculate the address
1154 * for backup GPT header.
1156 lba_backup_gpt_hdr
= vtoc
->efi_last_u_lba
+ 1 + nblocks
;
1157 if (posix_memalign((void **)&dk_ioc
.dki_data
,
1158 vtoc
->efi_lbasize
, dk_ioc
.dki_length
))
1161 memset(dk_ioc
.dki_data
, 0, dk_ioc
.dki_length
);
1162 efi
= dk_ioc
.dki_data
;
1164 /* stuff user's input into EFI struct */
1165 efi
->efi_gpt_Signature
= LE_64(EFI_SIGNATURE
);
1166 efi
->efi_gpt_Revision
= LE_32(vtoc
->efi_version
); /* 0x02000100 */
1167 efi
->efi_gpt_HeaderSize
= LE_32(sizeof (struct efi_gpt
) - LEN_EFI_PAD
);
1168 efi
->efi_gpt_Reserved1
= 0;
1169 efi
->efi_gpt_MyLBA
= LE_64(1ULL);
1170 efi
->efi_gpt_AlternateLBA
= LE_64(lba_backup_gpt_hdr
);
1171 efi
->efi_gpt_FirstUsableLBA
= LE_64(vtoc
->efi_first_u_lba
);
1172 efi
->efi_gpt_LastUsableLBA
= LE_64(vtoc
->efi_last_u_lba
);
1173 efi
->efi_gpt_PartitionEntryLBA
= LE_64(2ULL);
1174 efi
->efi_gpt_NumberOfPartitionEntries
= LE_32(vtoc
->efi_nparts
);
1175 efi
->efi_gpt_SizeOfPartitionEntry
= LE_32(sizeof (struct efi_gpe
));
1176 UUID_LE_CONVERT(efi
->efi_gpt_DiskGUID
, vtoc
->efi_disk_uguid
);
1178 /* LINTED -- always longlong aligned */
1179 efi_parts
= (efi_gpe_t
*)((char *)dk_ioc
.dki_data
+ vtoc
->efi_lbasize
);
1181 for (i
= 0; i
< vtoc
->efi_nparts
; i
++) {
1183 j
< sizeof (conversion_array
) /
1184 sizeof (struct uuid_to_ptag
); j
++) {
1186 if (vtoc
->efi_parts
[i
].p_tag
== j
) {
1188 efi_parts
[i
].efi_gpe_PartitionTypeGUID
,
1189 conversion_array
[j
].uuid
);
1194 if (j
== sizeof (conversion_array
) /
1195 sizeof (struct uuid_to_ptag
)) {
1197 * If we didn't have a matching uuid match, bail here.
1198 * Don't write a label with unknown uuid.
1201 (void) fprintf(stderr
,
1202 "Unknown uuid for p_tag %d\n",
1203 vtoc
->efi_parts
[i
].p_tag
);
1208 /* Zero's should be written for empty partitions */
1209 if (vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
)
1212 efi_parts
[i
].efi_gpe_StartingLBA
=
1213 LE_64(vtoc
->efi_parts
[i
].p_start
);
1214 efi_parts
[i
].efi_gpe_EndingLBA
=
1215 LE_64(vtoc
->efi_parts
[i
].p_start
+
1216 vtoc
->efi_parts
[i
].p_size
- 1);
1217 efi_parts
[i
].efi_gpe_Attributes
.PartitionAttrs
=
1218 LE_16(vtoc
->efi_parts
[i
].p_flag
);
1219 for (j
= 0; j
< EFI_PART_NAME_LEN
; j
++) {
1220 efi_parts
[i
].efi_gpe_PartitionName
[j
] =
1221 LE_16((ushort_t
)vtoc
->efi_parts
[i
].p_name
[j
]);
1223 if ((vtoc
->efi_parts
[i
].p_tag
!= V_UNASSIGNED
) &&
1224 uuid_is_null((uchar_t
*)&vtoc
->efi_parts
[i
].p_uguid
)) {
1225 (void) uuid_generate((uchar_t
*)
1226 &vtoc
->efi_parts
[i
].p_uguid
);
1228 bcopy(&vtoc
->efi_parts
[i
].p_uguid
,
1229 &efi_parts
[i
].efi_gpe_UniquePartitionGUID
,
1232 efi
->efi_gpt_PartitionEntryArrayCRC32
=
1233 LE_32(efi_crc32((unsigned char *)efi_parts
,
1234 vtoc
->efi_nparts
* (int)sizeof (struct efi_gpe
)));
1235 efi
->efi_gpt_HeaderCRC32
=
1236 LE_32(efi_crc32((unsigned char *)efi
,
1237 LE_32(efi
->efi_gpt_HeaderSize
)));
1239 if (efi_ioctl(fd
, DKIOCSETEFI
, &dk_ioc
) == -1) {
1240 free(dk_ioc
.dki_data
);
1250 /* if it's a metadevice we're done */
1252 free(dk_ioc
.dki_data
);
1256 /* write backup partition array */
1257 dk_ioc
.dki_lba
= vtoc
->efi_last_u_lba
+ 1;
1258 dk_ioc
.dki_length
-= vtoc
->efi_lbasize
;
1260 dk_ioc
.dki_data
= (efi_gpt_t
*)((char *)dk_ioc
.dki_data
+
1263 if (efi_ioctl(fd
, DKIOCSETEFI
, &dk_ioc
) == -1) {
1265 * we wrote the primary label okay, so don't fail
1268 (void) fprintf(stderr
,
1269 "write of backup partitions to block %llu "
1270 "failed, errno %d\n",
1271 vtoc
->efi_last_u_lba
+ 1,
1276 * now swap MyLBA and AlternateLBA fields and write backup
1277 * partition table header
1279 dk_ioc
.dki_lba
= lba_backup_gpt_hdr
;
1280 dk_ioc
.dki_length
= vtoc
->efi_lbasize
;
1282 dk_ioc
.dki_data
= (efi_gpt_t
*)((char *)dk_ioc
.dki_data
-
1284 efi
->efi_gpt_AlternateLBA
= LE_64(1ULL);
1285 efi
->efi_gpt_MyLBA
= LE_64(lba_backup_gpt_hdr
);
1286 efi
->efi_gpt_PartitionEntryLBA
= LE_64(vtoc
->efi_last_u_lba
+ 1);
1287 efi
->efi_gpt_HeaderCRC32
= 0;
1288 efi
->efi_gpt_HeaderCRC32
=
1289 LE_32(efi_crc32((unsigned char *)dk_ioc
.dki_data
,
1290 LE_32(efi
->efi_gpt_HeaderSize
)));
1292 if (efi_ioctl(fd
, DKIOCSETEFI
, &dk_ioc
) == -1) {
1294 (void) fprintf(stderr
,
1295 "write of backup header to block %llu failed, "
1301 /* write the PMBR */
1302 (void) write_pmbr(fd
, vtoc
);
1303 free(dk_ioc
.dki_data
);
1305 #if defined(__linux__)
1306 rval
= efi_rescan(fd
);
1315 efi_free(struct dk_gpt
*ptr
)
1321 * Input: File descriptor
1322 * Output: 1 if disk has an EFI label, or > 2TB with no VTOC or legacy MBR.
1330 struct extvtoc extvtoc
;
1332 if (ioctl(fd
, DKIOCGEXTVTOC
, &extvtoc
) == -1) {
1333 if (errno
== ENOTSUP
)
1335 else if (errno
== ENOTTY
) {
1336 if (ioctl(fd
, DKIOCGVTOC
, &vtoc
) == -1)
1337 if (errno
== ENOTSUP
)
1348 efi_err_check(struct dk_gpt
*vtoc
)
1352 diskaddr_t istart
, jstart
, isize
, jsize
, endsect
;
1356 * make sure no partitions overlap
1358 for (i
= 0; i
< vtoc
->efi_nparts
; i
++) {
1359 /* It can't be unassigned and have an actual size */
1360 if ((vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
) &&
1361 (vtoc
->efi_parts
[i
].p_size
!= 0)) {
1362 (void) fprintf(stderr
,
1363 "partition %d is \"unassigned\" but has a size "
1364 "of %llu\n", i
, vtoc
->efi_parts
[i
].p_size
);
1366 if (vtoc
->efi_parts
[i
].p_tag
== V_UNASSIGNED
) {
1369 if (vtoc
->efi_parts
[i
].p_tag
== V_RESERVED
) {
1370 if (resv_part
!= -1) {
1371 (void) fprintf(stderr
,
1372 "found duplicate reserved partition at "
1376 if (vtoc
->efi_parts
[i
].p_size
!= EFI_MIN_RESV_SIZE
)
1377 (void) fprintf(stderr
,
1378 "Warning: reserved partition size must "
1379 "be %d sectors\n", EFI_MIN_RESV_SIZE
);
1381 if ((vtoc
->efi_parts
[i
].p_start
< vtoc
->efi_first_u_lba
) ||
1382 (vtoc
->efi_parts
[i
].p_start
> vtoc
->efi_last_u_lba
)) {
1383 (void) fprintf(stderr
,
1384 "Partition %d starts at %llu\n",
1386 vtoc
->efi_parts
[i
].p_start
);
1387 (void) fprintf(stderr
,
1388 "It must be between %llu and %llu.\n",
1389 vtoc
->efi_first_u_lba
,
1390 vtoc
->efi_last_u_lba
);
1392 if ((vtoc
->efi_parts
[i
].p_start
+
1393 vtoc
->efi_parts
[i
].p_size
<
1394 vtoc
->efi_first_u_lba
) ||
1395 (vtoc
->efi_parts
[i
].p_start
+
1396 vtoc
->efi_parts
[i
].p_size
>
1397 vtoc
->efi_last_u_lba
+ 1)) {
1398 (void) fprintf(stderr
,
1399 "Partition %d ends at %llu\n",
1401 vtoc
->efi_parts
[i
].p_start
+
1402 vtoc
->efi_parts
[i
].p_size
);
1403 (void) fprintf(stderr
,
1404 "It must be between %llu and %llu.\n",
1405 vtoc
->efi_first_u_lba
,
1406 vtoc
->efi_last_u_lba
);
1409 for (j
= 0; j
< vtoc
->efi_nparts
; j
++) {
1410 isize
= vtoc
->efi_parts
[i
].p_size
;
1411 jsize
= vtoc
->efi_parts
[j
].p_size
;
1412 istart
= vtoc
->efi_parts
[i
].p_start
;
1413 jstart
= vtoc
->efi_parts
[j
].p_start
;
1414 if ((i
!= j
) && (isize
!= 0) && (jsize
!= 0)) {
1415 endsect
= jstart
+ jsize
-1;
1416 if ((jstart
<= istart
) &&
1417 (istart
<= endsect
)) {
1419 (void) fprintf(stderr
,
1420 "label error: EFI Labels do not "
1421 "support overlapping partitions\n");
1423 (void) fprintf(stderr
,
1424 "Partition %d overlaps partition "
1431 /* make sure there is a reserved partition */
1432 if (resv_part
== -1) {
1433 (void) fprintf(stderr
,
1434 "no reserved partition found\n");
1439 * We need to get information necessary to construct a *new* efi
1443 efi_auto_sense(int fd
, struct dk_gpt
**vtoc
)
1449 * Now build the default partition table
1451 if (efi_alloc_and_init(fd
, EFI_NUMPAR
, vtoc
) != 0) {
1453 (void) fprintf(stderr
, "efi_alloc_and_init failed.\n");
1458 for (i
= 0; i
< MIN((*vtoc
)->efi_nparts
, V_NUMPAR
); i
++) {
1459 (*vtoc
)->efi_parts
[i
].p_tag
= default_vtoc_map
[i
].p_tag
;
1460 (*vtoc
)->efi_parts
[i
].p_flag
= default_vtoc_map
[i
].p_flag
;
1461 (*vtoc
)->efi_parts
[i
].p_start
= 0;
1462 (*vtoc
)->efi_parts
[i
].p_size
= 0;
1465 * Make constants first
1466 * and variable partitions later
1469 /* root partition - s0 128 MB */
1470 (*vtoc
)->efi_parts
[0].p_start
= 34;
1471 (*vtoc
)->efi_parts
[0].p_size
= 262144;
1473 /* partition - s1 128 MB */
1474 (*vtoc
)->efi_parts
[1].p_start
= 262178;
1475 (*vtoc
)->efi_parts
[1].p_size
= 262144;
1477 /* partition -s2 is NOT the Backup disk */
1478 (*vtoc
)->efi_parts
[2].p_tag
= V_UNASSIGNED
;
1480 /* partition -s6 /usr partition - HOG */
1481 (*vtoc
)->efi_parts
[6].p_start
= 524322;
1482 (*vtoc
)->efi_parts
[6].p_size
= (*vtoc
)->efi_last_u_lba
- 524322
1485 /* efi reserved partition - s9 16K */
1486 (*vtoc
)->efi_parts
[8].p_start
= (*vtoc
)->efi_last_u_lba
- (1024 * 16);
1487 (*vtoc
)->efi_parts
[8].p_size
= (1024 * 16);
1488 (*vtoc
)->efi_parts
[8].p_tag
= V_RESERVED
;